Why would you?
Last week I ran into a variable called @continue in the sourcecode of a project I’m reviewing. At first I had to think a bit before I knew what the @ was for. Of course I knew it’s an escape character when used in front of a string value. But when used in front of a variable name? In that case, it is an escape character also, but this time for the name of your variable. This way you can use a reserved word as a variable name.